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An air puck of mass \(m_{1}\) is tied to a string and allowed to revolve in a circle of radius R on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a counterweight of mass \(m_{2}\) is tied to it. The suspended object remains in equilibrium while the puck on the tabletop revolves. What is
(a) the tension in the string?
(b) the radial force acting on the puck?
(c) the speed of the puck?
A vented tank of large cross-sectional area has a horizontal pipe .12m in diameter at the bottom. The tank holds a liquid whose density is 1500 kg/m^3 to the height of 4.0 m.
A beam of light enters the fiber from air at an angle theta1 with respect to the normal. What is theta1 if light strikes the core-cladding interface at critical angle theta c.
During a physics experiment, helium gas is cooled to a temperature of 20.0 K at a pressure of 0.150 atm, What are the mean free path in the gas
a student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 20m/s the stone travels 100 m horizntally and hits the beach. what is the height of the cliff
An Atwood system which has two masses, m1 = 2 kg and m2 = 2.1 kg. What is the net force on this system
When a current flows in an aluminum wire of diameter 2.45 mm, the drift speed of the conduction electrons is 1.05 × 10-4 m/s. What is the electron current in the wire
A -3.07 ?C charge is placed at the center of a conducting spherical shell, Calculate the total charge on the outer surface of the conductor
A motorist speeds horizontally of a 50.0 meter high cliff. If the motorist wants to land on level ground below 90.0 m form the base of the cliff. how fast must he motorcycle leave the cliff top to make this landing
Two charged spheres are 15 cm apart. They are moved, and the force on each of them is found to have been quadrupled. How far apart are they now.
A 0.30 kg mass is suspended on a string. In equilibrium the mass stretches the spring 2.0 cm downward. Calculate the total energy of the system
your car engine just died. your were moving rightward at 25 m/s, but your car slows to a rest in a distance of 120 m. what net average force was exerted on the car
A sailor strikes the side of his ship just below the waterline. He hears the echo of the sound reflected from the ocean floor directly below 1.3 s later. How deep is the ocean at this point? Suppose the speed of sound in seawater is 1560 m/s and d..
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